(2S,4R)-4-(2-trifluoromethyl-benzenesulfonyl)-pyrrolidine-2-carboxylic acid (1-cyano-cyclopropyl)-amide hydrochloride 、
三氟乙酸酐 以to give (2S,4R)-1-(2,2,2-trifluoro-acetyl)-4-(2-trifluoromethyl-benzenesulfonyl)-pyrrolidine-2-carboxylic acid (1-cyano-cyclopropyl)-amide as a pale yellow solid的产率得到(2S,4R)-1-(2,2,2-trifluoroacetyl)-4-(2-trifluoromethylbenzenesulfonyl)pyrrolidine-2-carboxylic acid (1-cyanocyclopropyl)amide